ui/button.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #pragma off (unreferenced)
  15 static char rcsid[] = "$Id: button.c,v 1.1 2004-12-19 13:08:49 btb Exp $";
  16 #pragma on (unreferenced)
  17
  18 #include <stdlib.h>
  19 #include <string.h>
  20
  21 #include "mem.h"
  22 #include "fix.h"
  23 #include "types.h"
  24 #include "gr.h"
  25 #include "ui.h"
  26 #include "key.h"
  27 #include "mono.h"
  28
  29 #define Middle(x) ((2*(x)+1)/4)
  30
  31 #define BUTTON_EXTRA_WIDTH  15
  32 #define BUTTON_EXTRA_HEIGHT 2
  33
  34 int ui_button_any_drawn = 0;
  35
  36 void ui_get_button_size( char * text, int * width, int * height )
  37 {
  38         int avg;
  39
  40         gr_get_string_size(text, width, height, &avg  );
  41
  42         *width += BUTTON_EXTRA_WIDTH*2;
  43         *width += 6;
  44
  45         *height += BUTTON_EXTRA_HEIGHT*2;
  46         *height += 6;
  47
  48 }
  49
  50
  51 void ui_draw_button( UI_GADGET_BUTTON * button )
  52 {
  53         int color;
  54
  55         if ((button->status==1) || (button->position != button->oldposition))
  56         {
  57                 ui_button_any_drawn = 1;
  58                 ui_mouse_hide();
  59                 gr_set_current_canvas( button->canvas );
  60                 color = button->canvas->cv_color;
  61
  62                 if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)button)
  63                         gr_set_fontcolor( CRED, -1 );
  64                 else
  65                 {
  66                         if ((button->user_function==NULL) && button->dim_if_no_function )
  67                                 gr_set_fontcolor( CGREY, -1 );
  68                         else
  69                                 gr_set_fontcolor( CBLACK, -1 );
  70                 }
  71
  72                 button->status = 0;
  73                 if (button->position == 0 )
  74                 {
  75                         if (button->text )      {
  76                                 ui_draw_box_out( 0, 0, button->width-1, button->height-1 );
  77                                 ui_string_centered(  Middle(button->width), Middle(button->height), button->text );
  78                         } else  {
  79                                 gr_setcolor( CBLACK );
  80                                 gr_rect( 0, 0, button->width, button->height );
  81                                 gr_setcolor( color );
  82                                 gr_rect( 1, 1, button->width-1, button->height-1 );
  83                         }
  84                 } else {
  85                         if (button->text )      {
  86                                 ui_draw_box_in( 0, 0, button->width-1, button->height-1 );
  87                                 ui_string_centered(  Middle(button->width)+1, Middle(button->height)+1, button->text );
  88                         } else  {
  89                                 gr_setcolor( CBLACK );
  90                                 gr_rect( 0, 0, button->width, button->height );
  91                                 gr_setcolor( color );
  92                                 gr_rect( 2, 2, button->width, button->height );
  93                         }
  94                 }
  95                 button->canvas->cv_color = color;
  96                 ui_mouse_show();
  97         }
  98 }
  99
 100
 101 UI_GADGET_BUTTON * ui_add_gadget_button( UI_WINDOW * wnd, short x, short y, short w, short h, char * text, int (*function_to_call)(void) )
 102 {
 103         UI_GADGET_BUTTON * button;
 104
 105         button = (UI_GADGET_BUTTON *)ui_gadget_add( wnd, 1, x, y, x+w-1, y+h-1 );
 106
 107         if ( text )
 108         {
 109                 MALLOC( button->text, char, strlen(text)+1 );
 110                 strcpy( button->text, text );
 111         } else {
 112                 button->text = NULL;
 113         }
 114         button->width = w;
 115         button->height = h;
 116         button->position = 0;
 117         button->oldposition = 0;
 118         button->pressed = 0;
 119         button->user_function = function_to_call;
 120         button->user_function1 = NULL;
 121         button->hotkey1= -1;
 122         button->dim_if_no_function = 0;
 123
 124         return button;
 125
 126 }
 127
 128
 129 void ui_button_do( UI_GADGET_BUTTON * button, int keypress )
 130 {
 131         int result;
 132         int OnMe, ButtonLastSelected;
 133
 134         OnMe = ui_mouse_on_gadget( (UI_GADGET *)button );
 135
 136         button->oldposition = button->position;
 137
 138         if (selected_gadget != NULL)
 139         {
 140                 if (selected_gadget->kind==1)
 141                         ButtonLastSelected = 1;
 142                 else
 143                         ButtonLastSelected = 0;
 144         } else
 145                 ButtonLastSelected = 1;
 146
 147
 148         if ( B1_PRESSED && OnMe && ButtonLastSelected )
 149         {
 150
 151                 button->position = 1;
 152         } else  {
 153                 button->position = 0;
 154         }
 155
 156         if (keypress == button->hotkey )
 157         {
 158                 button->position = 2;
 159                 last_keypress = 0;
 160         }
 161
 162         if ((keypress == button->hotkey1) && button->user_function1 )
 163         {
 164                 result = button->user_function1();
 165                 last_keypress = 0;
 166         }
 167
 168
 169         //if ((CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) && (keyd_pressed[KEY_SPACEBAR] || keyd_pressed[KEY_ENTER] ) )
 170         //      button->position = 2;
 171
 172         if ((CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) && ((keypress==KEY_SPACEBAR) || (keypress==KEY_ENTER)) )
 173                 button->position = 2;
 174
 175         if (CurWindow->keyboard_focus_gadget==(UI_GADGET *)button)
 176                 if ((button->oldposition==2) && (keyd_pressed[KEY_SPACEBAR] || keyd_pressed[KEY_ENTER] )  )
 177                         button->position = 2;
 178
 179         button->pressed = 0;
 180
 181         if (button->position==0) {
 182                 if ( (button->oldposition==1) && OnMe )
 183                         button->pressed = 1;
 184                 if ( (button->oldposition==2) && (CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) )
 185                         button->pressed = 1;
 186         }
 187
 188         ui_draw_button( button );
 189
 190         if (button->pressed && button->user_function )
 191         {
 192                 result = button->user_function();
 193         }
 194 }
 195
 196
 197
 198
 199